How do I know the Apple ID associated with a particular device (Macbook Pro)? How do I change it?
One of my friend gifted me a Macbook Pro as a gift, and we don't know how to change its Apple ID. He has his Apple ID and password which works perfectly with this Macbook. After changing it, will updating to OS X 10.7 or reinstalling online possible?
Does this process completely disconnect from the previous Apple ID and connect with the new one?